May not set both `read_only` and `write_only`

In my project I want to set password as both read_only(because I have a separate endpoint to reset password) and write_only(because I don't want password send in the response).

Here is my serializer:

class UserSerializer(serializers.ModelSerializer):
    """A Serizlier class for User """

    class Meta:
        model = models.User
        fields = ('id', 'email', 'phone_number', 'user_type', 'password')
        extra_kwargs = { 'password': { 'write_only': True} }
        read_only_fields = ('password',)

But I get an error saying:

AssertionError at /api/user/21/

May not set both read_only and write_only

How can I have a field be both read_only and write_only?

Override the __init__() method of the serializer as,

class UserSerializer(serializers.ModelSerializer):
    """A Serizlier class for User """

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        if self.context['some_flag']:
            self.fields['password'].read_only = True
        else:
            self.fields['password'].write_only = True

    class Meta:
        model = models.User
        fields = ('id', 'email', 'phone_number', 'user_type', 'password')
        # extra_kwargs = { 'password': { 'write_only': True} } # remove this
        # read_only_fields = ('password',) # remove this

The some_flag variable is something that you should pass to the serializer either from the password reset view or from the other view